You can complain about a lot of things on DRK, but complaining about about delays on animations is blasphemy. Those are quick (except Plunge, but we all hate Plunge's delay).
When i play MCH i feel the clunkiness. i really do. But not as DRK. All is smooth (EXCEPT PLUNGE ;__

and nice, especially when you want to use oGCDs between weaponskills.
Don't forget DRK has highest skill speed of all tank classes, so this may be your problem, when it comes to popping 2 oGCD in one GCD. especially under Blood Weapon.
PS your previous post had more than 1k chars. What is this magic. i have to cut my posts by 3/4 (literally) once i finish typing.